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Full text of "The Flow Of Gases In Furnaces"

318

APPENDIX VIII

TABLE ^—Continued
COMBUSTION OF BLAST FURNACE GAS—COMPUTATION SHEET 3

Computation for curves showing the effects of preheat upon calorific in-
tensity.   Values from Sheets 1 and 2.

Temperature of Preheat
	0°
	200°
	400°
	600°
	800°

Calories released by gas at 0° ..... (A)
	1861
	
	
	
	

Added to gas by preheat                (I?)
	
	144
	296
	456
	622

Preheated gas (A -j- J5) ........... S
	
	2005
	2157
	2317
	2483

Added by air preheat 100% ...... (C)
	
	94
	191
	292
	394

Preheated air (A-\-C) ........... (D}
	
	1955
	2052
	2153
	2257

Preheat gas and air (D-h-S) ......  £
	
	2099
	2348
	2609
	2879

Added by air preheat 120% ...... (J?)
	
	113
	229
	350
	473

Preheated air (A-+E] ........... (F)
	
	1974
	2090
	2211
	2334

Preheated gas and air (.F-KB) . . . .  S
	-----
	2118
	2384
	2667
	2956

Added by air preheat 140 % ...... ((?)
	
	132
	267
	409
	552

Preheated air (A+G) ........... (//)
	
	1993
	2128
	2270
	2413

Preheated air and gas f/7-f j?) ___ 2
	
	2137
	.2424
	2726
	3035

Added by air preheat 180%   .      (K)
	
	170
	344
	526
	710

Preheated air (A+K) ........... (L)
	
	2031
	2205
	2387
	2571

Preheated air and gas (L-f B) . . . . 2
	
	2175
	2501
	2843
	3193

The values marked S, D, F, H, L are spotted upon the heat capacity
curves for their corresponding air supplies, and curves are drawn through
these points which enable certain approximations to be made in. regard to
other air supplies and temperatures of preheat.